I highly doubt you'll be able to "go online" with LocalTalk. It's not a TCP/IP protocol.
If you use the modem serial port with a modem, then yes you can do so "off a LocalTalk port". But LocalTalk is a LAN-type protocol meant for file and printer sharing. Just like FTP can't be used for IRC, neither can AFP be used for the network time protocols (although, with hacks, likely).
On the same token, you cannot run MacIP (LocalTalk) and TCP/IP (eg. using an Ethernet card) at the same time. The TCP/IP application in 7.5+ will not permit this. (Only LocalTalk Bridge does something like this, and it's just a software variant of a LocalTalk to Ethernet bridge, aka AsanteTalk or Farallon iPrint.) You won't be able to do it either in 7.0 or System 6, because the Network CDEV will only let you use one interface at a time.
The only time I believe you can be online on one interface (like Ethernet) and LAN-enabled on the other (eg. through FireWire, which is an odd way of networking things) is with OS X.
If you have all computers hooked together with a router via Ethernet, and that router has internet access, then you can use LAN and Internet at the same time. There may be some variant of some $$$$ LocalTalk gateway thing that I've heard of before in a fleeting remark or passage but I don't remember it, but it may be able to do what you'd like.
Getting any computer older than about '95/96 generations is sort of pointless, other than to say you did or show off to friends. Web pages are glacially slow and many don't render right. If you want to view a .JPG image that's, say 800x600, it might take five minutes to restore curser control.
If you use the modem serial port with a modem, then yes you can do so "off a LocalTalk port". But LocalTalk is a LAN-type protocol meant for file and printer sharing. Just like FTP can't be used for IRC, neither can AFP be used for the network time protocols (although, with hacks, likely).
On the same token, you cannot run MacIP (LocalTalk) and TCP/IP (eg. using an Ethernet card) at the same time. The TCP/IP application in 7.5+ will not permit this. (Only LocalTalk Bridge does something like this, and it's just a software variant of a LocalTalk to Ethernet bridge, aka AsanteTalk or Farallon iPrint.) You won't be able to do it either in 7.0 or System 6, because the Network CDEV will only let you use one interface at a time.
The only time I believe you can be online on one interface (like Ethernet) and LAN-enabled on the other (eg. through FireWire, which is an odd way of networking things) is with OS X.
If you have all computers hooked together with a router via Ethernet, and that router has internet access, then you can use LAN and Internet at the same time. There may be some variant of some $$$$ LocalTalk gateway thing that I've heard of before in a fleeting remark or passage but I don't remember it, but it may be able to do what you'd like.
Getting any computer older than about '95/96 generations is sort of pointless, other than to say you did or show off to friends. Web pages are glacially slow and many don't render right. If you want to view a .JPG image that's, say 800x600, it might take five minutes to restore curser control.